CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue
Product Sales	$ 5,851	$ 7,420
Barrier Rentals	1,485	5,777
Royalty Income	427	420
Shipping And Installation Revenue	2,672	1,601
Total Revenue	10,435	15,218
Cost Of Goods Sold	8,787	9,496
Gross Profit	1,648	5,722
Operating Expenses
General And Administrative Expenses	1,159	1,325
Selling Expenses	662	595
Total Operating Expenses	1,821	1,920
Operating Income (loss)	(173)	3,802
Other income (expense)
Interest Expense	(48)	(42)
Interest Income	3	9
Gain (loss) On Sale Of Assets	39	46
Other Income (expense)	20	(7)
Income (loss) Before Income Tax Expense (benefit)	(159)	3,808
Income Tax Expense (benefit)	(40)	941
Net Income (loss)	$ (119)	$ 2,867
Basic And Diluted Earnings (loss) Per Share	$ (0.02)	$ 0.55
Weighted Average Number Of Common Shares Outstanding:
Basic	5,230	5,202
Diluted	5,230	5,210